Dynamic terminal printing with python

The simplest way, if you only ever need to update a single line (for instance, creating a progress bar), is to use '\r' (carriage return) and sys.stdout:

import sys
import time

for i in range(10):
    sys.stdout.write("\r{0}>".format("="*i))
    sys.stdout.flush()
    time.sleep(0.5)

If you need a proper console UI that support moving the pointer etc., use the curses module from the standard library:

import time
import curses

def pbar(window):
    for i in range(10):
        window.addstr(10, 10, "[" + ("=" * i) + ">" + (" " * (10 - i )) + "]")
        window.refresh()
        time.sleep(0.5)

curses.wrapper(pbar)

It's highly advisable to use the curses.wrapper function to call your main function, it will take care of cleaning up the terminal in case of an error, so it won't be in an unusable state afterwards.

If you create a more complex UI, you can create multiple windows for different parts of the screen, text input boxes and mouse support.

I hacked this script using curses. Its really a ad-hoc solution I did for a fun. It does not support scrolling but I think its a good starting point if you are looking to build a live updating monitor with multiple rows on the terminal.

https://gist.github.com/tpandit/b2bc4f434ee7f5fd890e095e79283aec

Here is the main:

    if __name__ == "__main__":
        stdscr = curses.initscr()
        curses.noecho()
        curses.cbreak()
        curses.start_color()
        curses.init_pair(1, curses.COLOR_GREEN, curses.COLOR_BLACK)
        curses.init_pair(2, curses.COLOR_RED, curses.COLOR_BLACK)
        curses.init_pair(3, curses.COLOR_YELLOW, curses.COLOR_BLACK)
        curses.init_pair(4, curses.COLOR_CYAN, curses.COLOR_BLACK)

        try:
            while True:
                resp = get_data()
                report_progress(get_data())
                time.sleep(60/REQUESTS_PER_MINUTE)
        finally:
            curses.echo()
            curses.nocbreak()
            curses.endwin()

When I do this in shell scripts on Unix, I tend to just use the clear program. You can use the Python subprocess module to execute it. It will at least get you what you're looking for quickly.

import time
for i in range(10):
    print('\r{}>'.format('='*i), end='')
    time.sleep(0.5)

I don't think that including another libraries in this situation is really good practice. So, solution:

print("\rCurrent: %s\t%s" % (str(<value>), <another_value>), end="")